Self-contained air conditioner



Jan. 26, 1943. M. c. TERRY ETAL SELF CONTAINED AIR CONDITIONER 4 Sheets-Sheet 1 Filed Jan. 11, 1940 lwcnfca Maison C. Ter

Jan. 26, 1943.

M. C. TERRY ETAL SELF CONTAINED AIR CONDITIONER Filed Jan. l1, 1940 4 Sheets-Sheet 2 am/.M

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Jan. 26, 1943. M, c, TERRY ErAL 2,309,224

SELF CONTAINED AIR CONDITIONER Filed Jan. 11, 1940 4 Sheets-Sheet 3 ft: 1:3: E.

139" 42 45 ea- IL-:aIE-:ag-:-I-j 25h *we h Il! J l U b 1; f3? 35h m Inventors Mason C.Terrx. Paul Komroff Jan. 26, 1943. M, Q TERRY TAL 2,309,224

SELF CONTAINED AIR CONDITIONER Filed Jan. 1l. 1940 4 Sheets-Sheet 4 COOLlNG 'TEM PERED VENTILATNG .L F 11E. 1:1.

Matson C, Terrg Paul Komroff Patented Jan- 26, 1943 um Sur-00mm AIB CONDITION Matson C. Terry and Paul Komroil, Toledo, ohio,

assignments. to Matson C.

Application January 1l, 1940, Serial No. 313,410 14 claims- (CL 62--81 This invention relates to room cooling and ventilating apparatus but more particularly to a sell-contained unit having a cooling system embodying condenser. evaporator and compressor devices and which are adapted to deliver conditioned air to a room or other space.

An object is to produce apparatus o! the above character which is adapted to introduce temconditioned introduced into the Another object oi this an apparatus oi the above simple and inexpensive in construction and embodies a damper plate which can be selectively moved to one oi several positions thereby to adapt the unit for diiierent purposes such as cooling, ventilating or exhausting.

A further object is to produce a simple and eiilcient apparatus oi the above c which can be readily adapted by of baille or damper plates to to be used for air cooling, ventilating or exhausting purposes.

A still iurther object is to enable apparatus oi the above character when used for air pering purposes or warm air, such manner evaporator coils such temperature that liability oi irosting oi the eva rator coils is prevented.

A still further obiect is to produce a simple and eicient apparatus of the above which lcan be conveniently mounted in va window opening and which has the novel features of con. struction and arrangement enabling it to be inuiactured and to occupy a minition reside in and arrangement o! more specincally set fo Embodiments oi the invention are shown by way oi' illustration but not o!v tation on the accompan drawings in which:

lis a front Y bined Ventilating and cooling windowfopening;

Figure 2 is an enlarged horlxontal sectional view oitheunit shownonmgure i;

66 or cooled. A portion Figure 3 is a vertical sectional elevation substantially on the line I-I oi Figure 2 showing particularly the manner in which the baile plate is moved into position adjacent the condenser:

Figure 4 is a horizontal or longitudinal sectional view oi an alternate iorm oi window unit which can be adapted for use in addition to an air cooler and ventilator also for the purpose oi warming or tempering air;

Figure 5 is a horizontal or longitudinal sectional view of another form oi window unit in which temperature responsive means controls the air delivered to the cooling coils when the unit is employed for air warming or tempering purposes:

Figure 6 is a fragmentary sectional elevation on the line t-l oi Figure 5 showing particularly the air discharge duct and control damper therefor;

Figure the 5 PUI'POSGSZ FigureliisaviewsimilartoFigure-'lbutshowing the unit adapted ior use as a ventilator by which air is forced into the rooml for Ventilating FigureSisaviewsimilartoFigures'landll showing the unit adjusted for use as an air warmlng or tempering device;

Figure 10 is a similar diagrammatic view showing the unit adiusted for exhausting air from the inside oi the room:

Figures l1,` l2. and 13 are diagrammatic views showing the unit illustrated on Figures 2 and 3 adjusted for purposes ventilating and exhausting respectively:

Figures 14, l5, 16 and l'l are diagrammatic views oi the unit shown on Figure 4 adiusted ior air cooling. ventilatlng. tempered ventilating and exhausting respectively.

The illustrated embodiment of the invention comprises a window unit indicated generally at It which is mounted in a window opening proiirst raising the window sash Il sui'- the rearportion of the unit.

The unit comprises a cabinet Il provided with a plurality oi horizontal louvres in this instance, arranged to direct the air discharged therefrom at an upward angle or toward the ceiling oi the room to be ventilated oi the iront wall Il is free of louvres and is equipped with a control knob i3 selectively movable to diil'erent positions for controlling the operation oi' the fans and cooling unit disposed within the cabinet. It will be understood that the knoby i3 is operatively connected to any suitable form of switch so that by turning the knob the refrlgerating machine and the fan motor may be simultaneously energized.

or that the fan motor may be operated independently ot the refrigerating machine; also that the fan motor may be rotated in the desired direction as will hereinafter more fully appear. The cabinet also has side walls Il and a hinged top wall I3. the hinge being at the rear portion so that the cover may be swung upwardly from the inside of the room to afford access to the inside of the cabinet. As indicated by the broken lines on Figure 1, the portion of the cabinet which projects outside of the window has a tapered top wall and the extreme outer end of the cabinet is open as indicated particularly on Figure 3.

Formed in one side wall Il on the inside oi the room is an opening I3 protected by a series oi horizontally disposed rods 23. Formed in the portion of the side wall disposed on the outside is an air opening 2i which is protected by a screen 22. It will be observed that the openings i3 and 2| are iuxtaposed to each other and a sliding damper 23 having an operating knob or handle 24 controls both openings. It will be apparent that the damper 23 can completely close oil' the opening 22 or materially restrict the opening i3 or it can be moved to such position as to close off a portion of each of these openings. This enables all outside air or all inside air or a mixture of outside and inside air to be drawn into the cabinet as will hereinafter appear.

Arranged inside of the cabinet I3 is a compressor type reirlgerating machine of the type including a condenser 25 and evaporator or cooling coil 23 and a motor compressor unit 21. Since the parts form no part of the present invention and are well-known to those skilled in this art, further description and illustration is not considered necessary. Suiiice it to say that the condenser is made up of a series of coils 23 arranged in vertically spaced relation (Figure 3) and a plurality oi' vertically disposed, closely spaced ns or plates 23 to receive the coils 23. As shown the condenser 25 covers substantially the entire opening at the rear end of the cabinet. The cooling coil is disposed at the front end of the unit and is arranged vertically to cover a substantial portion of the front portion thereof closely arranged to the louvres I3. The remaining portion of the front opening' of the cabinet is covered by a suitable lte'r 3l.

' The motor-compressor unit 2l, the condenser 25 and the cooling coil 23 are connected together by suitable tubing, not shown. Asuitable refrigerant expansion means. not shown. such as a thermostatic expansion valve or capillary restrictor tube is located in the refrigerant circuit .between the outlet of the condenser 25 and the inlet of the cooling coil 23 in a manner well understood to those skilled in the refrigeration art. i

As shown, the inside -oi the cabinet is divided into twocompartments by a wall or partition 3| having mutable insulation. This wall extends in an irregular manner from the front wall between the lter 33 and the cooling coil 23 and thence construction and operation of these independently of rearwardly in an inclined fashion terminating near one end of the condenser 2l. This separates the cabinet into an evaporator chamber E and a condenser chamber C.

In this instance, an electric motor 32 is disposed within the condenser chamber C and has its armature shaft 33 projecting beyond opposite ends and in a direction longitudinally of the cabinet. Secured to one end oi' the shaft 33 and disposed within the condenser chamber C is a radial bladed or propeller type fan 34 and xed to theV opposite end of the shaft 33 and positioned within the evaporator chamber E is a similar fan 33, the latter being somewhat smaller than `the fan 34. 'I'he blades of theians 34 and 35 are similarly inclined so that in the operation of the motor 32 which is a. reversible motor, the lans create streams of air extending in the same direction. About the fan 34 is a shroud 36 which is connected to the partition 3| and also to the edge of one of the llns 23 ofV the condenser. About the fan 35 is a shroud 3l and it will be observed that the fan 35 is juxtaposed to the air openings I3 and 22 so as to draw in air through one or both of such openings or discharge air therethrough as will hereinafter appear.

Suitably mounted in the chamber in rear of the iilter 30 are channels or guides 33 adapted to receive side edges of a plate or damper 33 having a handle 43. When in place in the guides 33 the damper 33 blocks the passage of air into the room through the illter 33. By lifting the hinged cover i3 of the cabinet. the handle 40 may be grasped to remove bodily the damper from the guides 33. As indicated on Figure 3. in the rear portion of the cabinet is a rearwardly and downwardly curved guide 4i, it being understood that a similar guide is attached to the plate in which the fan shroud 33 is mounted. The guides 4| enable the damper 33 when the cover i3 is swung upwardly, to be iitted into the guides 4i so that opposite side edges of the panel engage respectively guides 4i. The damper 33 then may be forced rearwardly and downwardly along the guide 4i to assume a position directly in front of the left-hand portion oi' the condenser 25 substantially as indicated by the broken lines on Figure 2. The damper 33 is preferably of material sumrciently exible to enable it to accommodate 4itself to curvilinear guides ol' this type.

The operation oi' the above described apparatus is diagrammatically illustrated in Figures l1 to 13. In Figure ll, it will be noted that the damper 33 is disposed in rear of the lter 33 so as to shut ofi the passage of air through the iilter. The cooling apparatus is rendered operative and the fan motor 32 which is controlled the cooling apparatus is operated to drive the fans 34 and 35 in the direction of the arrow a. f The Ian 34 draws in air` from the outside over a portion or the condenser as indicated by the arrows, thus imparting a cooling inuence to the condenser. It will be observed that the air is drawn in through the right-hand side oi' the condenser and discharged through the left-hand side of the condenser. The slide damper 23 is moved to such position that a portion of the air may be drwn from the room through the opening I3 and anotherasoman 3 toonepositionoranothertocontroitheair. larityorpitehofthebladesoi'theianlla. drawninbythe fan Il. Figure l5 shows the apparatus used for venti- Whenitisdesiredtousetheapparatustor ventiiating purposes, the damper 8| is disposed in the position shown on Figure 12 or in front or the left-hand portion of the 2l. In this instance, the cooling apparatus is shut oir and the ian motor I! is operated to rotate the amature shaft in the direction of the arrow b which is the same as that shown on Figure 11. The air drawn in by the ian 3l is forced into the room through the lter and the air drawn in by the fan is forced through the cooling coil 26 and into the room. Thus it will be apparent that both fans Il and 35 operate con- ;olritiy to deliver air to the room when the apparatus is used for Ventilating purposes. In this instance. the slide damper 23 is moved to such position as to shut oil the room air so that all outside air is discharged into the room.

In some instances, it is desirable to utilize an apparatus for exhausting air from the room, as, for example, where the room is illled with smoke. Referring to Figure i3, it will .be understood that the parts are arranged similarly to the showing on Figure 12. However, in this case, the ian motor 32 is reversed, thereby causing fans ll and l5 to rotate in the opposite direction or in the direction indicated by the arrow c. This reverse rotation of the fans creates streams of air from the room through the filter 3l and cooling coil Il and out through the right-hand portion of the condenser 25 and the outside opening 2l respectively, the slide damper 23 being disposed in position to close the opening to the inside of the room.

The alternate form of the invention shown on Figure 4 is similar to that above described with the exception that the ian a has its blades differently inclined or pitched so that in the operation of the reversible motor 32a the fans 34a and 15a work in opposite directions and the longitudinal thrust imparted by the fans in the operation of the motor is in opposite directions. this being one of the advantages of the arrangement in that it reduces the thrust imposed on the motor shaft 33a. In this instance, the removable damper panel 39a. is turned 90 to enable it to be mounted in the guides inrear of the condenser 25a, the guide channels being separated from each other sumciently to accommodate the damper in that position. It will also be observed that the shroud for the fan lla has a lateral extension reducing the size of the opening through the condenser on the right-hand portion of the ligure. 'Ihis is of importance in increasing the velocity of air discharged from the unit when employed for cooling purposes (Figure 14) and reduces the area oi' the condenser through which air passes when the unit is used for tempered Ventilating (Figure 16) The operation of the apparatus shown on Figure 4 is diagrammatically illustrated on Figures 14 to 1'7 inclusive. Figure 14 shows the apparatus used for air cooling purposes, the cooling apparatus operating as well as the fans. I'he latter rotate in the direction of the arrow a. From a comparison ot the arrows on Figure 14 and those on Figure 11, it will be observed that the only difference is that the condenser fan Ila operates to draw in air from the outside through the left-hand portion of the condenser and discharge it through the right-hand portion of the condenser. This operation is due. as will be readily understood, to the change in the angulating purposes and comparing that ngure with Figure 12, it will be noted .that the baille or damper plate 39a is similarly munged, although theslidedamperllaisadiustedtoanintermedia-te position uncovering a. portion of the openingsleadingtotheinsideoftheroomandto the outside. The fans are driven in the direction ci the arrow b' or in a direction opposite to that shown in Figure 12. As a result the fan Iladischargesairintothe roomsimiiartothe showing on Figure 12 but the evaporator ian ila draws air from the inside oi the room, and. as shown, discharges a portion outside and another portion is returned to the room.

The parts shown on Figure 16 are disposed similarly to the arrangement shown on Figure 15, the fans being driven in the same direction. However, in this case the cooling apparatus is operated and as a result air drawn in from the outside is warmed or tempered in passing over the right-hand portion of the condenser 25a. The air will also pick up by radiation some heat from the left-hand portion of the condenser. The room air passes over the evaporator Ilia and imparts its heat thereto and is then discharged to the outside through the opening 22a. It will thus be apparent that the source of heat is derived from the air from the inside oi the room upon passing through the evaporator and thence to the outside, this being of particular advantage in that the accumulation o! frost on the evaporator coils is' prevented. As a further use of this apparatus. Figure 17 illustrates its operation for exhausting purposes by which air from the inside of the room is exhausted to the outside. The operation of the apparatus in this case is somewhat diu'erent from that shown in Figure 13 in that the evaporator fan Ita draws air from the inside of the room through the opening Il and it over the cooling coil 26a to the inside of the room. the fans being operated in the direction of the arrow c' which is opposite to the direction of rotation of the fans according to Figure 13.

From the above description with respect to the apparatus shown in Figure i it will be apparent that the unit may be'used ior air cooling purposes, for Ventilating purposes, for warming air introduced into the room and for exhausting air from the room. It will be understood that the cooling apparatus is operated only when the apparatus is used for air cooling or tempered ventilating purposes. By enabling the apparatus to have such a variety of uses, its usefulness is oi much wider scope and during greater portions or the year.

In the alternate form of the invention shown on Figures 5 to 10, the condenser 25h, motor compresser unit 21h and evaporator 28o is similariy arranged. Also the reversible motor IIb. condenser ian Mb and evaporator ian lib are similar in structure and operation to the form oi' the invention shown on Figures 2 and 11 to 13. In this instance, in addition to the damper plate IIb is a similar damper plate I1 which is conveniently mounted directly in rear oi' the damper 1lb with the side edges mounted in similar guides. Arrangeddirectlyinrearoi'thelei'thand portion oi the condenser 2lb are guides lltoreoeivethedamperplates llband after they have been turned through a arc as described in connection with Figure 4. Arranged in advance of the cooling coil 2lb is a pair of 4 asoasaa guides 44 which are adapted to receive one of the damper plates 39h and 42. It will be observed that the cooling coil lib is spaced a slight distance rearwardly of the guides 44 to provide with a baille plate, when the latter is in place, a vertical passage 4l which communicates at its upper end with a horizontal passage or duct 46 which extends rearwardly having an open rear end communicating with the outside. a rain shield 4l being disposed at the rear end of the passage 46. A similar shield 48 extends outwardly beyond the top of the condenser coll 2lb. At the juncture of the passages and 4I is a iiap valve 49 which is mounted on a horizontal pivot l and has a spring ll for holding the valve normally seated to seal the duct 45 from the duct 4I. When the baule plate, such as the plate 42, is inserted in its guides 44 after the cover lsb has iirst been swung upwardly, the valve 4! is engaged by the damper plate 42 and swung to its open or dotted line position (Figure 6).

Referring now to the diagrammatic views 7 to l0, inclusive, it will be understood that Figure 'I shows an arrangement oi' the parts when the apparatus is used for air cooling purposes. In that form the damper plates 42 and 38h are disposed ln their guides in rear of the iliter 30h, the fans and other parts operating in accordance with the above description in connection with Figure 1l. The cooling apparatus is placed in operation and the fan 34h draws in air through the right-hand portion oi the condenser 25h and discharges the same through the left-hand portion of the condenser. The evaporator fan )b draws in air through one or both of the side openings and forces the same through the evaporator 26h and into the room. When the apparatus is used for ventilating purposes, the bafiles 39h and 42 are removed from their position directly in rear of the lter IIb and inserted into the guides 43 in rear of the left-hand portion of the condenser. It will be apparent that the apparatus then is adapted to operate vslmilarly to that described in connection with Figure l2, both fans operating to draw in outside air and discharge the same into the room.

When it is desired to use the apparatus .for tempered Ventilating purposes or for Warnung air discharged into the room, the damper plate llb is disposed in rear of the left-hand portion of the condenser 25h. The damper 42 is disposed in the guides i4 in advance of the evaporator 2Gb. The cooling apparatus is then operated and also the fans are placed in operation. The condenser fan 34h then draws in air through the right-hand portion of the condenser 2lb, the air thus being warmed or tempered and such air is then discharged into the room through the lter Bllb. 0n the other hand, the evaporator fan 15b operates to draw in outside air, inside air or a mixture of outside `and inside air as will hereinafter appear, and forces the same through the evaporator lib into the vertical passage 45. From the passage 45, the air passes rearwardly from the apparatus through the horizontal duct 4B.

In order to prevent frost or ice from accumulating on the evaporator when the apparatus is used for tempered Ventilating purposes, it is necessary that the surface temperature of the evaporator 26h be maintained above 32 F. at all times. The accumulation of frost or ice on the evaporator 2Gb would restrict and eventually stop the air flow through the evaporator and possibly damage it. In order to maintain the surface oi' the evaporator above 32 F., it is necessary that the temperature of the air entering the evaporator be suiliciently high to provide sumcient heat load to the evaporator. As the temperature of the air leaving the evaporator bearsa certain relationship to the temperature of the air entering the evaporator in a unit oi this type, the temperature o! the leaving air may be employed as a means of controlling the entering air temperature through use of a suitable damper controlling the proportion of outside and inside air entering the evaporator, said damper being thermostatically operated and the temperature responsive element being placed in the air stream leaving the evaporator. For this purpose, the slide damper Nb is arranged to be moved in response to the temperature changes of the air leaving the evaporator coil 2Gb in such a man ner as to regulate the proportion of inside and outside air drawn in by the evaporator fan h or to enable all outside air to be drawn in by that fan. For this purpose, a slide damper 2lb has a bracket 52 which has a pin 5I riding in a longitudinally elongate slot 54 in an arm 55. The arm 55 is pivoted between its ends at 5B and is normally urged to a position closing the outside opening 22h by a spring 51. Engaging the opposite end of the arm 55 is a thermostatic bellows 58 which is anchored at one end within the cabinet and has a tube E9 communicating with a bulb Btl disposed in close relationship to the evaporator coil 2Gb and within the chamber 45. The bulb B0 may contain aisultable liquid which responds to temperature changes so that as the temperature oi the air leaving the evaporator increases, the bellows il expands and overcomes the tension of the spring Il to move the slide damper 2lb in a direction to open the outside opening 22h and reduce the inside opening 9b. The converse action of the damper takes place when the temperature of the air leaving the evaporator decreases.

It will be understood that other forms of temperature responsive devices may be employed for actuating the slide damper. Furthermore, it w-ill be understood that the slide damper may be actuated in response to temperature changes within the evaporator chamber,` the refrigerant in the evaporator itself or the outside temperature, as will readily be apparent to those skilled in this art. By providing thermal responsive means to control the air drawn into the evaporator chamber; yfrosting of the evaporator 26h is overcome, thereby enabling the apparatus to be employed effectively as an air warming or tempering appara-tus for introducing fresh tempered air into the room when the outside temperature is relatively low. A knob 2lb enables the slide `damper 2lb to be operated manually, suitable means being ail'orded to retain the damper in the desired position of adjustment. In this instance, the knob :4b is in screw-threaded engagement with the stem carried by the damper 2lb, the stem being adapted to ride in an elongate slot in a relatively narrow strip Il. The knob 24h is rst loosened and then the damper 2lb can be manually moved to the dired position, whereupon the knob is tightened upon its stem so as to hold itin place.

In the form o! the invention shown in Figure 10. the operation o! the fan motor lib is reasoaasc tus is inoperative when'the apparatus is chamber, the evaporator chamber having side used for exhausting purposes as well as when openings communicating respectively with the the Iapparatus is used solely for ventilating purinside and outside of the space to be conditioned. poses. a damper for said side openings adapted to un- From the above description, it willbe apparent 5 cover one or the other or a portion o i each, a that we have produced a single unit for supplying two way operating ian in each chamber. the conto a room cool, dehumidified, fresh air, or which denser chamber ian being arranged normally to can be employed to introduce in sizable volume draw in outside air through a portion o! the conltered outside air when the reirigerating madenser and discharge same through another porchine is not operating. or which can be employed tion of the condenser, and concomitantly the to exhaust from the room air in large volume or evaporator chamber fan Operating to drow in when desired, introduce into the room heated and discharge same over the evaporator into the filtered outside air. It will be manifest that space to be conditioned, and a reversible motor the unit is compact and the parts have been so for driving said fans, Said fans being arranged arranged as to reduce to a minimum the size to impart longitudinal thrusts in the same direcof the cabinet. The use of propeller type fans tion. is o! importance from a cost standpoint and it 2. In an air conditioning unit, a cabinet adaptwill be observed that neither ian is disposed ed to be disposed within a window opening, an closely to an opening or to an imperiorate wall opening at the iront communicating with the inso that not only is the eiliciency increased bu the 9,0 side or the space to be conditioned and an opennoise is reduced to a minimum. It will further ing at the rear communicating with the outside, be observed that the arrangement of the fans is a cover for said cabinet, a partition separating such as to create an exceedingly uniform flow of the inside oi.' the cabinet into two chambers and air through all parts of the condenser and evapextending from a point substantially midway of orator. By arranging the axes of the fans and the iront opening diagonally toward one side oi the fan motor longitudinally of the cabinet, the the cabinet, a refrigerating machine including an depth of the cabinet is materially reduced. The evaporator substantially covering the front openremoval oi the condensate in a reirigerating ma' ing oi one chamber and a condenser substantially chine of this character is oi importance and covering the rear opening oi the other chamber. the particular method of condensate removal in the evaporator chamber having sideY openings this apparatus makes possible the above described communicating respectively with the inside and fan arrangement, and although the means oi' outside oi the space to be conditioned. a damper condensate removal is generally indicated on for said side openings adapted to uncover one or Figure 3 of the drawings, detailed description the other or a. portion oi each. a two way operat and further illustration is not considered necesing fan in each chamber, the condenser chamber sary since the same is fully shown and described fan being arranged normally to draw in outside in our co-pending application Serial No. 303,966, air through a portion oi the condenser and disilled November 13, 1939. charge same through another portion oi the con- Another advantage of employing propeller type denser, and concomitantly the evaporator chamians is that it makes possible the reversing iea- 40 ber ian operating to draw in air and discharge ture above described. The arrangement of the same over the evaporator into the space to be fan motor as wen as the motor-compresser unit conditioned, and a reversible motor for driving in the condenser chamber militates against said fans. said fans being constructed t0 impart heated air being supplied to the space to be conlongitudinal thrusts in opposite directionsditioned and both the ian motor and the motor 3- In an oir conditioning unit, ecabinet compressor unit are so positioned that air euradapted to be disposed Within 9 WiDdOW Opening. rents from the condenser ian impart a cooling im Opening et the front cmmllniciiing With the influence thereto. inside of the space to be conditioned and an It is to be understood that numerous changes opening at the rear communicating with the outin details of construction, operation and arrange- Side, a @over for Said 08 net. d Partition Sepement o! parts may be effected without departing rating the inside of the cabinet into two chamirom the spirit of the invention especially as debers and extending from a Point Substantialiir iined in the appended claims. The expressions midway of the front opening diagonally toward inside and outside in the claims reier respeeone side of the cabinet, a refrigerating machine tively to the room or space to be air-conditioned including an evaporator Substarli'iiiy Covering and to the space outside oi.' the room or space to the front opening of one chamber and a conbe conditioned. Furthermore, it is to be underdenser Substantially Covering the reel' Opening stood that the expressions "condenser chamber of the other chamber. the evaporator chamber and "evaporator chamber as used in the claims having side openings Communicating respeeiiveiy is to denne those chambers containing the evapso with the inside and outside oi the space to be orator or the condenser. conditioned, a damper for said side openings What we claim is: adapted to uncover one or the other or a portion l. In an air conditioning unit, a cabinet of each, a two way operating fan in each chamadapted to be disposed within a window opening, ber, the condenser chamber fan being arranged an opening at theA iront communicating with the 35 normally to draw in outside air through a porinside oi' the space to be conditioned and an opention oi the condenser and discharge same ing at the rear communicating with the outside, through another portion oi the condenser, and a cover for said cabinet, a partition separating concomitantly the evaporator chamber fan operthe inside of the cabinet into two chambers and ating to draw in air and discharge same over extending from a point substantially midway of the evaporator into the space to be conditioned. the front opening diagonally toward one side of and a reversible motor for driving said fans, said the cabinet, a reirigerating machine including fans being constructed to impart longitudinal an evaporator substantially covering the iront thrusts in opposite directions. opening o! one chamber and a condenser sub- 4 An air conditioning unit comprising a sub stantially covering the rear opening of the other 7 5 stantially rectangular casing adapted to be posia lateral air inlet opening. one of the chambers when said reversible air forcing means is operat` containing a motor-compressor unit, a fan, a ing in the iirst mentioned direction. I

motor i'or operating said ian and a condenser 7. An air conditioning and Ventilating unit substantially co-extensive with said rear opencomprising a cabinet having separate evaporator including a Shroud for said ian dividing said last ing communicating with the inside of the space verse partition extending from a point substancondenser chamber opening and discharge such bers havingan outside opening and the other of into the condenser chamber and back to the t he rs having outlet and inlet openings, outside over another portion oi' said condenser said iirst c r containing a motor-comwhen said reversible air forcing means is operatpressor unit, a fan, a motor for operating said ing in the rst mentioned direction, and a i'an fan. and s condenser covering the outside openin said evaporator chamber operatively coning of said one chamber, said ian and fan motor 40 nected to said reversible air forcing means tor having their axes substantially parallel to the forcing air from said evaporator inlet through condenser. the other of said chambers containing said inside evaporator opening to the inside of parallel to said condenser, and means in said outside and inside o( the space to be conditioned.

dividing same into two compartments. whereby cluding an evaporator lin said evaporator chamair is drawn in through one portion of the conber, a condenser and a motor-compressor unit denser and discharged through another portion in Said Condenser chamber reversible air i'orcins' of the condenser, means in said cabinet for forcing air through 6,

to be conditioned. the condenser chamber having an opening communicating with the inside said air forcing means direct air from the of the om to be eondieioned and an opening outside into said condenser chamber and back communicating with the outside or said space. to the outside when said reversible air forcing a refrigerating apparatus including an evapos means is operating in the iirst mentioned dirator in the evaporator chamber and a condenser retionin the condenser chamber, means for circuiat- 9. In an air conditioning unit, a cabinet ing air through said evaporator chamber, readapted to be disposed within a window opening, vel-sible air forcing means in the condenser an opening at the front communicating with the chamber arranged when driven in one direction 7o inside 01 the space to be conditioned and an to draw outside air through said outside conopening at the rear communicating with the out- 2,309,994. '7 irigerating machine including an evaporator subthrough said iront opening, and a reversible moco ans stantialiv ring the iront opening o! one tor common to said f chamber and a condenser substantially covering 12. In an air conditioning unit, a cabinet havthe rear opening of the other chamber, the evaping an evaporator chamber, an evaporator oi a orator chamber having side openings communi. 5 reirigeratlng apparatus in said chamber. opencating respectively with the inside and outside ings in said chamber communicating respectively oi the space to be conditioned, a damper for said with the inside and outside o! the space to be side openings adjustable to uncover oneor the conditioned, a passageway providing an addiother or a portion o! each, a ian in each chamtional communication between said chamber and ber, the condenser chamber ian being arranged 1o the outside or the space to beA conditioned, a normally to draw in outside air through a porclosure for said passageway, and temperature retion of the condenser and discharge same sponsive means lor closing one or the other o! through another portion of the condenser to the said openings or partially uncovering both oi said outside oi the space to be conditioned, a motor openings. common to said fans and arranged in the con- 15 13. An air conditioning unit comprising a casdenser chamber, and baille means in said coning adapted to be positioned in a window of a denser chamber adjustable to cooperate with said space to be conditioned, a portion of said casing condenser chamber ian to discharge air through being disposed on the inside and another porthe iront opening of the condenser chamber. tion on the outside of the window, a vertically i0. In an air conditioning unit, a cabinet .m arranged transversely disposed partition dividadapted to be disposed within a window opening. ing said casing into two chambers, one of the oniopening ot'the front communicating withthe chambers having an outside opening-at the rear inside o! the spacetobe ondltioned and an openend thereof and the other chamber having a ing at the rear communicating with the outside. iront air outlet opening and a pair or air inlet a partition separating the inside of the cabinet openings communicating chamber an ding from a point substantialdem er sommo d air inlet, openings an ly midway of the front o onally to adjustable to close one or the other, one o the ward one side or the cabinet. a reirigerating machambers containing a motorcompressor unit, a chine including an evaporator substantially cov- 3u ian. a motor for operating said fan, and a conering the iront opening oi the evaporator chamdenser substantially co-extensive with said rear ber and a condenser substantially covering the opening, the axes of said ian motor and ian berear opening or the condenser chamber, the evaping substantially parallel to said condenser. orator chamber having side openings eommunimeans including 'a shroud for said ian dividing eating respectively with the inside and outside 3,-, said last chamber into two compartments wherespace to be conditioned, a damper for said side by the ian is adapted to draw in air through one o ada d to uncover one or the other or portion o! the condenser a discharge the same portion 0f eheh. there be c ront op g through an er ion or the condenser, the for the condenser c a en other of said chambers containing a fan, a ait ber grim said evaporator, a filter covering said iront con- 4o leading from said fan motor extending through denser chamber opening, a two-way operating said partition for operating sai last fan, and an Ian in each chamber, the condenser chamber ian evaporator covering being arranged normally to draw in outside air and arranged substantially parallel to said conthrough a portion or the condenser and discharge denser.

ugh another portion o! the condenser, 45 i4. An air conditioning unit comprising a cas a reversible motor common to said fans. and baiing adapted to be positioned in a window or a tie means in said condenser chamber adjustable space to be conditioned, a portion oi said casing to cooperate with said condenser chamber fans being disposed on the inside and another portion to discharge air through the iront opening or the on the outside or the window, a vertically arcondenser chamber. so ranged transversely disposed partition dividing In an air conditioning unit. Cabinet said easing into two chambers, one oi the charndisposed thin a window opening, bers having an outside opening at the rear end an at the iront communicating with the thereof and the other chamber having a front air inside or the space to be conditioned and an outlet opening and a or air inlet openings opening at the rear eommunicatin with the out- 55 communicating respectively with the inside and side. a partition seperaiingthe inside oi the cabioutside or the space to be conditioned, damper net into two chambers and extending from a means for controlling the flow of air through said frigerating machine including an evaporator substantially covering the front opening of one co-extensive with said rear ope the axes of chamber and a condenser substantially covering said ran motor and fan being substantially parthe rear opening of the other chamber, the evapaliel to said condenser, means including a shroud orator chamber having side openings communi` for said fan dividing said last 'chamber into two eating respectively wi e inside nd outside 65 com ments whereby the fan is adapted to draw er the space con tioned a damper for said in air through one port on or the condenser an side o adjustable to uncover one or e discharge e same through another portion ci ian in each chamber. the condenser chamber taining a ian, a shaft leading from said ian mo- :an being Trang ly to diaw in outside tor extending through said partition for opera air through a porti n of the conde r and dising said last Ian. an evaporator cove he charge same through another portion o! the confront end outlet opening and arranged substanr ranged normally to draw air through one or both or said side openings and discharge such air 7s pAUL, KOMROFE 

